//=====================================================================
// Copyright 2020 (c), Advanced Micro Devices, Inc. All rights reserved.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files(the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions :
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
//=====================================================================

#ifndef _IMAGEVIEW_H
#define _IMAGEVIEW_H

#include <QtWidgets>
#include <QScrollArea>
#include <QGridLayout>
#include <QLabel>
#include <QIcon>
#include <QMap>
#include <QFile>
#include <QGraphicsScene>
#include <QGraphicsSceneEvent>
#include <qtimer.h>

#include "cpimageview.h"
#include "acimageview.h"
#include "acexrtool.h"
#include "cpimageloader.h"
#include "accustomdockwidget.h"


#define TXT_IMAGE_PROCESSED     "Processed"
#define TXT_IMAGE_ORIGINAL      "Original"
#define TXT_IMAGE_DIFF          "Diff"


enum eImageViewState {
    isProcessed = 0,            // we are viewing the processed image (child of an original image at root of project explorer)
    isOriginal,                 // Original image as seen at a root node of project explorer
    isDiff                      // Viewing a image differance from (origin - processed)
};

typedef struct {
    bool onBrightness   = false;
    bool reloadImage    = false;
    bool generateDiff   = false;
    bool generateMips   = false;
    float fDiffContrast = eImageViewState::isOriginal;
    eImageViewState  input_image;
} Setting;

class PushButtonAction : public QWidgetAction {
  public:
    explicit PushButtonAction(const QIcon & icon, const QString & text, QObject *parent = 0)
        : QWidgetAction(parent) {
        setIcon(icon);
        setObjectName(text);
    }

  protected:
    virtual QWidget * createWidget(QWidget * parent) {
        return new QPushButton(icon(), objectName(), parent);
    }

    virtual void deleteWidget(QWidget * widget) {
        delete widget;
        widget = NULL;
    }
};

class cpImageView : public acCustomDockWidget {
    Q_OBJECT
  public:

    cpImageView(const QString filePathName, const QString Title, QWidget *parent, CMipImages *MipImages, Setting *setting, CMipImages *OriginalMipImages = NULL);
    ~cpImageView();

    void InitData();


    void showToobar(bool show);
    void showToobarButton(bool show);

    void EnableMipLevelDisplay(int level);
    void EnableDepthLevelDisplay(int level);

    int  activeview      = 0;
    bool m_CompressedMipImages;
    QPointF m_localPos;

    Setting             m_setting;                      // Local copy of settings

    CImageLoader        *m_imageLoader;
    acImageView         *m_acImageView;
    QMenu               *m_viewContextMenu;
    CMipImages          *m_processedMipImages;
    CMipImages          *m_OriginalMipImages;            // Read only pointer to original images
    acEXRTool           *m_ExrProperties;                // HDR image properties window

    QAction             *actSaveView;
    QAction             *actSaveBlockView;

    QSize               m_imageSize;
    int                 ID;
    int                 XBlockNum;
    int                 YBlockNum;
    int                 m_source_BlockXPos;
    int                 m_source_BlockYPos;

    bool                m_localMipImages;
    bool                m_bOnacScaleChange;
    bool                m_useOriginalImageCursor;
    bool                m_DiffOnOff;
  protected:
    void keyPressEvent(QKeyEvent *event);

  public slots:
    void OnToolBarClicked();                                // Hook into the CustomeWidgets TitleBars On Tool Button Clicked events
    void oncpImageViewMousePosition(QPointF *scenePos, QPointF *localPos, int onID);
    void oncpImageViewVirtualMousePosition(QPointF *scenePos, QPointF *localPos, int onID);
    void onDecompressUsing(int useDecomp);
    void oncpResetImageView();
    void onZoomLevelChanged(int value);
    void onacScaleChange(int value);
    void onResetHDRandDiff(int value);
    void onacPSNRUpdated(double value);
    void onToolListChanged(int index);
    void onViewCustomContextMenu(const QPoint &point);
    void onSaveViewAs();
    void onSaveBlockView();
    void onBrightnessLevelChanged(int value);
    void onToggleViewChanged(int view);

  private:
    void showEvent(QShowEvent *);
    void paintEvent(QPaintEvent * event);
    void setActionForImageViewStateChange();
    void closeEvent(QCloseEvent * event);
    void getSupportedImageFormats();
    void GetSourceBlock(int BlockX, int BlockY, std::string filename);

    eImageViewState m_ImageViewState;
    // Common for all
    QWidget            *m_newWidget;
    QGridLayout        *m_layout;
    QWidget            *m_parent;
    QToolButton        *m_button2;
    QToolButton        *m_button;
    QToolBar           *m_toolBar;
    QStatusBar         *m_statusBar;
    QPushButton        *m_buttonNavigate;

    QLabel              *m_labelColorTxt;
    QLabel              *m_labelTxtView;
    QLabel              *m_labelColorRGBA;
    QLabel              *m_labelPos;
    QLabel              *m_labelBlockPos;
    QWidget             *m_pMyWidget;
    QSpinBox            *m_ZoomLevel;
    QSpinBox            *m_BrightnessLevel;
    QLabel*              m_PSNRLabel;

    QStyle              *Plastique_style;                   // Combobox Style

    QPixmap             *m_pixmap;
    QString             m_QtImageFilter;

    int                 m_MipLevels;
    int                 m_MaxDepthLevel;                    // 1..CMP_MIPSET_MAX_DEPTHS
    int                 m_DepthLevel;                       // depthsupport
    bool                m_FitOnShow;                        // Flaged used to to indicate a fit image into view when widget is shown

    // Image View Actions
    QAction             *imageview_ResetImageView;
    QAction             *imageview_ToggleChannelR;
    QAction             *imageview_ToggleChannelG;
    QAction             *imageview_ToggleChannelB;
    QAction             *imageview_ToggleChannelA;
    QAction             *imageview_ToggleGrayScale;
    QAction             *imageview_InvertImage;
    QAction             *imageview_ImageBrightnessUp;
    QAction             *imageview_ImageBrightnessDown;
    QAction             *imageview_MirrorHorizontal;
    QAction             *imageview_MirrorVirtical;
    QAction             *imageview_RotateRight;
    QAction             *imageview_RotateLeft;
    QAction             *imageview_ZoomIn;
    QAction             *imageview_ZoomOut;
    QAction             *imageview_ViewImageOriginalSize;
    QAction             *imageview_FitInWindow;
    QAction             *imageview_ImageDiff;
#ifdef _DEBUG
    QComboBox           *m_CBimageview_Debug;
#endif
    QComboBox           *m_CBimageview_Toggle;
    QComboBox           *m_CBimageview_GridBackground;
    QComboBox           *m_CBimageview_ToolList;
    QComboBox           *m_CBimageview_MipLevel;
    QComboBox           *m_CBimageview_DepthLevel;
    QComboBox           *m_CBimage_DecompressUsing;

    acVirtualMouseHub    m_customMouse;

    CMIPS               *m_CMips;

  Q_SIGNALS:
    void UpdateData(QObject *data);
    void OnSetScale(int value);

  public slots:
    void onImageDiff();

};


#endif // _IMAGEVIEW_H